Furnace or stove structure



April 16, 1929. A. ERICKSON 1,709,467

FURNACE-OR STOVE STRUCTURE 2 Sheets-Sheet l April 16, 1929. A. ERICKSONFURNACE OR STOVE STRUCTURE Filed April 1928 2 Sheets-Sheet Patented Apr.16, 1929.

-UFNITEDYSVTA' TES PATENT O CE AUGUsrERIcKsoN, or mmmiaronrs, MINNESOTA.

FURNACE on STOVE STRUCTURE.

Application fijledApril 2, 1928 Serial No. 266,589.

, This invention relates to a stove or furnace of the hot air, hot wateror steam type, which vide a furnace having a fire pot with a cylindricalchamber thereabove,'having an annular chamber. disposed about saidcylindrical chamber, adapted to carry the heated medium of the furnacesurrounding said first men-, tioned chamber and extending thereover,said annular chamber having a central opening through the top thereof,an outer chamber being provided about said annular chamber for thepassage of the products of combustion.

These and other objects and advantages'of the invention will be fullyset" forth in the following description made in connection with theaccompanying drawings, in which "like reference characters refer tosimilar parts throughout the several views and in which Fig. l'isa'central vertical section through a furnace embodying the invention,the same being of the hot air type; a

, Fig. 2 is altopplan view of the device'shown 'Fig. 3 is a centralvertical section of a furnace embodying the invention and which is ofthe hot water or steam type; and

Fig. 4 is a top plan view of the device shown in Fig. 3.

Referring to the drawings, particularly Figs. 1 and 2, a furnace isshown havingthe base plate having a vertical wall or partition 5extending upwardly adjacent one side thereof, with which connects ahorizontal partition 5 The partitions 5* and 5? have a flange 5 whichsupports a grate member- 6 which maybe of any desired construction, the:

, same in the embodiments of the invention illustrated, being showniasformed of a plate having slots extending thereacross. A fire 0t 7 issupported on partitions 5? and ,5" and 7 18s a forwardly extendingchamber 7 a form? ing the char "mi passage therefor, which passagehas tc arging d0Dl 8. H-t'1tl3 front from the base member 5 and at the frontpora smoke pipe and will lead to a flueor chimtabs heated.

end. The space between the base 5 and partition 5 forms the ash pitwhich is provided with an-ash door 9 having a plurality of openings 9therein, arranged in the are of a or plate 10 thereon carried on a screwshaft 11 having a handle 11*. at-its front end, which screw is threadedinto a central boss on the door 9. A shell 12 is supported on the top ofthe fire pot 7 being received in a channel formed by flanges 7 b on the'top'of said fire pot, which member 12 has an annular chamber 12 thereinhaving an inwardly extending top portion surroundinga cylindrical upperportion 12 open at its top and bottom. The

an inwardly extending flange 12 to which is bolted the bottomandoutwardly extending flange 13 of the member 13,: which member is inthe form of aninverted pot or shell, the same thus'being closed at itstop and being illustrated as tapering upwardly slightlytoward its closedend. An outer shell 14 of general cylindrical shape extends upwardlytion of the 'furnacefrom'the top of the fire pot 7, said shell beingspaced from the-member 12 to form a chamberthereabout; l The top plate'15 fits over the top of the shell 14 and has a depending flangeextending around. the top of said shell The top plate 15 has an upwardlyextending flange 15 at one sidesurroundlng an'opening leading therefrom,to which 1s connected the pipe 16 which forms ney. It will be seenlthatsaidpipe 16 com .municates with thei'nside of chamber 12.

The member 12 has a plurality of spaced cylindrical 1 openings 12*" Iextending therethrough adjacent its bottom, which form passagesconnecting the space between members 12 'and 13 with the space orchamber-between member '12 and the outer shell 14. Said shell '14adjacent its bottom and at its rear side has afprojecting flange 14 towhich is conair from the space or rooms which are heated. A cylindrical1nember18 surrounds member 12 and extends substantially to thetop ofplate"15,,said memberha'ving a top plate 18 and having a pluralityofoutwardly ex tending cylindrical flanges or hubs 18 to which areconnected the pipes or conduits 19 which will conduct the hot air he the0 l1 circle, said door 9 also having a draft door '6 member 12'at itsinner and'lower side has nected a .pipe-17 forming a return pipe for theIn. operation fuel will be suppliedthrough.

the door 8 and through passage-T to the fire pot 7 being supported ongrate Gas shown in Fig. 1. The fuel will be burned in the fire space tobe heated will pass into the shell 14 through the pipe 117, thus fillingthe space surrounding fire pot? and partition The .air Wlll be somewhatheat-ed by engagement with the walls of the fire pot and will pass upabout member 12 and through the openings orpassages 12 between members12 and 13 and thence upwardly through member 12 into member 18'and outthrough the pipes 19 by which itwillbe carriedto the rooms to be heated.Itwill be seen :that the air will be highly heated as it passes .tothetop of the furnace and out at the pipes 19. Draft can be supplied to thefire in the usual way, by"

regulation of the door and a damper (not shown) w ll be supplied in thepipe 16. It will be seen that the air passing into the furnace throughpipe 17 will engage a large area of heated surface as it passes upwardlyand through the member 12 so that it is ver a a Y effectively heated andpractically all of the heat supplied by the fuel is absorbed.

Referring to Figs. 3 and ,4, a furnace struc ture is shown;'comprisingthe base plate adjacent one sideof which rises the wall orpartition 25' connecting with the horizontal partition 25", saidpartitions having a circular fian e 25 ada ated to suoaortthe rate b to26. While this grate may be of any usual and desired form, intheembodiment of the invention illustratedit is shown as a plate havingtransverscslots therein. A member 27 is supporfted aipon the partition25, the same having a substantiallycylindrical portion forming 'thefirepot 27 the same having the parallel walls 27 extending at its forwardside to form between them acharging passage 25". Th s passage w ll beclosed at its front by a charging door 28 of any suitable construction.and the frontfof the ash pit below the grate 26 will be ,olosed by theash door 23 having the draft openings 28" therein adapte'd to becontrolled bythe plate 28 carried on the screw 28 havingav handle at itsThe member 27 may have a do uble wallformmg achamber 27 .therea-boutandthe same has the top 27 projecting rearwardly as a.

flange. The flange 27 and top 27 are providcd with lugs for positioninga cylindrical casing extending upwardly therefrom and supporting the top'29 of the furnace. A cylindrical casing 30 extends from base plate 25to the top, 29, the same extending outer end and threaded into the door28.

upwardly alongside of the members 27 and across the topthercof as shownin Fig. 3,'said member 29 having depending flanges sur rounding thecasings 30 and 30. The casing 31 is supported on the "top 27 having acentral cylindricalportlon 31 wlth an open bottom disposedcentrallythereof and'over the fire pot 2 7 thus forming an annular chamber 31".The member 31 has the central opening at its top through which extendsaconduit 32 extending through the top 29 and having a flange above saidtop on which is received a cover plate 33 having a handle 33"" thereon.The member 31 has a boss at one side of its top in which is threaded thestem or hot water outlet pipe 3 1 which extends through the top 29, andsaid member has a boss at its lower portion receiving the pipe 35extending outwardly through casings 3O= and 30 which is connected to thepipe 35 cxtending inwardly through casing 30 and secured in .a boss onthe rear wall of member 27, pipes 35 and 35 thus forming a passagebetween chambers 31 and 27. 'Aipipe'36 is threaded into a boss in thelower portion of member 27 which communicates with chamber 27 andextends outwardly through chamber 30, said pipe forming a return pipefor the water returning from the rooms to be heated. Said pipe also hasconnected thereto another pipe 37 con trolled by a valve 38 which mayconstitute a feed water pipe. The top 29 has aniupwardly extending boss29 about whi-ch'extends the smoke pipe 39.

In operation water Wlll be supplied to chambers 27 and 31 through thepipe 37.

Fuel "ill be charged into the fire potthrough passage 2T- and the door28 as indicated atlO. The products ofcombustion from the fuel will passupwardly into the portion 31 of member 31 outwardly around the bottom ofmember 31 and upwardly at the sides thereof between the same and casing30 the same passingout at the smoke pipe 39. The heat will be conservedby theinsulating chamber of air between casings SSW and 130. The hotwater or steam, as the casemay be, will pass from the upper portion ofmember 31 out through the pipe 34: to the radiators and will returnthrough the pipe 36 to the lower portion of chamber 27 This water willbe heatedby the heat of the fire pot 27 and will pass through the pipes35 and 35 to the bottom of chamber 31 where it will be furtherv heatedby the said products of combustion. The draft can be regulated as usualby the member-30. It will be secnthat owing to the shape of member 31that the heated products of combustion will bear upon allsi des thereofv and that a comparatively narrow body of water is. formed in chamber 31which can be effectively heated. 'Ifdesired, after the furnace is inoperation, fuel, can be charged through the member 32 by removing thecover 33 and fuel can thus be built up to the top of the fire pot 27and-extending somewhat there'- above. V

From the above description it is seen that applicant has provided asimple and very efii-r cient construction of stove or furnace and onewhich Wlll have a high degree of eificlency 1n the. use of the fuel. Thedevice is such that it can be built in various sized units, and can beThe easily and inexpensively constructed. device has been amplydemonstrated in actual practice and found to be very successful andefficient. I

It Will, or course, be understoodthat various changes may be made in theform, details, arrangement and proportions of the parts, withoutdeparting from the scope of applicants invention, which, generallystated, con-- sists in a device capable of carrying out the objectsabove set forth, in the novel parts and combinations of parts disclosedand defined in the appended claims.

\Vhat is claimed is 1. A furnace having in combination, a fire pot, asubstantially cylindrical chamber open at its bottom and closed at itstop,1spaced directly above said fire pot and of substantially the samediameter as said fire pot, an annular chamber having a closed bottomdisposedin a horizontal plane substantially at the bottom of saidcylindrical chamber, said annular chamber surrounding said cylindricalchamber and extending over the top thereof and adapted to receive the;medium heated and distributed by the furnace, a second annular chambersurrounding said first mentioned annular chamber and communicating atits bottom With said cylindrical chamber to receive the products ofcombustion, a conduit leading from said second annular chamber to achim- .ney and. a third annular chamber surrounding said second annularchambcr,;the outer wall of which forms the outer Wall of said furnace,saidthird annular chamber extend- -ing to the bottom of saidfurnace,'passages leading from said third annular chamber into saidfirst mentloned annular chamber at each side thereof, asubst-antiallyhorizontal plate extending about said fire pot and forming the bottom ofsaid second annular chamber and a plane, the diameter of said memberbeing sub stantially the same as the diameter of said fire pot, anannular chamber surrounding said member, said chamber being closed atits bottom andadapted to receive the medium heated and distributed bythe furnace, a casing surrounding said annular chamber and spaced fromthe Wall thereof and having a top Wall extending over said annularchamber and spaced from the top thereof, said last mentionedcasingforming a passage for the products of combustion about said annularchamberand over the top thereof and a conduit extending into said firstmentioned annular chamber through Which said medium is adapted to pass.

In testimonyvvhereof I affix my signature.

AUGUST ERICKSON.

